OO-686,OPENOLAT-32: fix enter behavior in wizard, enhance the user search form to accept enter in the autocomplete field and the user attributes form

non-jira: fix js errors in translation tool due to prototype->jquery migration, adding some i18n keys

OO-533: fix RS by bulk change if no item is selected in the details view, fix flexi table "0 showing 0", fix error search, add Indexer to probes

OO-533 UI tune the pool admin area, adding i18n intro help texts, new css classes to make master-detail view with menu panels

OO-533 various layout improvements question pool, streamlined highlight color in table, calendar and buttons

OO-535: import items directly in pools, lists... implements new item, add more attributes in the table, wording...

OO-535: QTI editor export section and assessment directly to QPool, import test from repository, implement remove permissions for pools and groups, replace "I'm a custom helper"

OO-535: fix several issues for question pool, delete and copy of items quicker reflected on the gui, search gui issues, doesn't show ID per default in admin part...

OO-622,CL-225: remove username from GUI in place where is not really needed and students can see it. Mark others place with //TODO username where it need more works and/or the username is only visible by author/coach/admin... Additional fix the setup sql for MySQL (index too long).

OO-619: more options for single page, SCORM, CP and structure node. Options are the same with the same GUI all over the place